/* 表格 */
table {
	width: 800px;
	margin: 10px auto
}

table tr {
	height: 50px;
}

table tr > td {
	text-align: center
}

/* 导航栏 */
nav {
	background: lime;
	padding: 5px 0px
}

nav > div {
	width: 800px;
	margin: auto
}

/* 页 */
.pageCon {
	width: 800px;
	margin: auto;
}

.clearFloat:after {
	clear: both;
	display: block;
	content: ""
}